Chloro benzoate cyanine picolinium photoacid excited-state proton transfer to water

Ori Green; Oren Gajst; Ron Simkovitch; Doron Shabat; Dan Huppert

doi:10.1016/j.jphotochem.2017.08.056

Chloro benzoate cyanine picolinium photoacid excited-state proton transfer to water

Ori Green
, Oren Gajst
, Ron Simkovitch
, Doron Shabat
, Dan Huppert

School of Chemistry

Tel Aviv University

Research output: Contribution to journal › Article › peer-review

Abstract

Steady-state and time-resolved fluorescence techniques were employed to study the photoacidity of a newly synthesized photoacid, the chloro benzoate cyanine picolinium salt. It was found that the ESPT rate constant is ultrafast in water (k_PT = 6.2 × 10¹²s⁻¹). We also found that the kinetic isotope effect is ∼1.7. The deprotonated form of the photoacid has a short lifetime of about 95 ps.

Original language	English
Pages (from-to)	230-237
Number of pages	8
Journal	Journal of Photochemistry and Photobiology A: Chemistry
Volume	349
DOIs	https://doi.org/10.1016/j.jphotochem.2017.08.056
State	Published - 1 Dec 2017

Keywords

Excited-state proton transfer
Kinetic isotope effect
Nonradiative rate
Photoacid
Time-resolved fluorescence

ASJC Scopus subject areas

General Chemistry
General Chemical Engineering
General Physics and Astronomy

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10.1016/j.jphotochem.2017.08.056

Cite this

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title = "Chloro benzoate cyanine picolinium photoacid excited-state proton transfer to water",

abstract = "Steady-state and time-resolved fluorescence techniques were employed to study the photoacidity of a newly synthesized photoacid, the chloro benzoate cyanine picolinium salt. It was found that the ESPT rate constant is ultrafast in water (kPT = 6.2 × 1012s−1). We also found that the kinetic isotope effect is ∼1.7. The deprotonated form of the photoacid has a short lifetime of about 95 ps.",

keywords = "Excited-state proton transfer, Kinetic isotope effect, Nonradiative rate, Photoacid, Time-resolved fluorescence",

author = "Ori Green and Oren Gajst and Ron Simkovitch and Doron Shabat and Dan Huppert",

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doi = "10.1016/j.jphotochem.2017.08.056",

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TY - JOUR

T1 - Chloro benzoate cyanine picolinium photoacid excited-state proton transfer to water

AU - Green, Ori

AU - Gajst, Oren

AU - Simkovitch, Ron

AU - Shabat, Doron

AU - Huppert, Dan

PY - 2017/12/1

Y1 - 2017/12/1

N2 - Steady-state and time-resolved fluorescence techniques were employed to study the photoacidity of a newly synthesized photoacid, the chloro benzoate cyanine picolinium salt. It was found that the ESPT rate constant is ultrafast in water (kPT = 6.2 × 1012s−1). We also found that the kinetic isotope effect is ∼1.7. The deprotonated form of the photoacid has a short lifetime of about 95 ps.

AB - Steady-state and time-resolved fluorescence techniques were employed to study the photoacidity of a newly synthesized photoacid, the chloro benzoate cyanine picolinium salt. It was found that the ESPT rate constant is ultrafast in water (kPT = 6.2 × 1012s−1). We also found that the kinetic isotope effect is ∼1.7. The deprotonated form of the photoacid has a short lifetime of about 95 ps.

KW - Excited-state proton transfer

KW - Kinetic isotope effect

KW - Nonradiative rate

KW - Photoacid

KW - Time-resolved fluorescence

UR - https://www.scopus.com/pages/publications/85030766209

U2 - 10.1016/j.jphotochem.2017.08.056

DO - 10.1016/j.jphotochem.2017.08.056

M3 - مقالة

SN - 1010-6030

VL - 349

SP - 230

EP - 237

JO - Journal of Photochemistry and Photobiology A: Chemistry

JF - Journal of Photochemistry and Photobiology A: Chemistry

ER -

Chloro benzoate cyanine picolinium photoacid excited-state proton transfer to water

Abstract

Keywords

ASJC Scopus subject areas

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